Pipe-wrench.



.l. A. ROBERTS.

PIPE WRENCH.

APPLICATION FILED 050.29. 1915.

1 ,1 85,346 Patented May 30, 1916.

1' .Z. 6 6 q 7 7i? /7 I 1 I 9 Q 12 14 W/TNES'SES INVENTOI? A "ORA/E1 8JAMES A. ROBERTS, OF MARIETTA, OHIO.

PIPE-WRENCH.

Specification of Letters Patent. Patented May 30, 1916.

Application filed December 29, 1915. Serial N 0. 69,160.

To all whom it may concern:

Be it known that I, JAMES A. ROBERTS, a citizen of the United States,and a resident of Marietta, in the county of Washington and State ofOhio, have invented certain new and useful Improvements in Pipe-Wrenches, of which the following is a specification.

My invention relates to pipe wrenches, and some of the objects thereofare to provide such a device which is easily adjusted to and removedfrom the pipe, which takes a firm grip and will not slip, and which isstrongly made and durable in service.

A further object is to provide a replaceable die which serves as thebiting jaw and which die provides eight edges all of which can be wornout before a new die is required, and, with these and other objects, myinvention consists in the structure hereinafter described and claimed.

My invention is fully described in the following specification, of whichthe accompanying drawings form a part, in which like characters refer tolike parts in each of the views, and in which Figure '1 is a side viewof my wrench in a position preparatory to engagement with a pipe; Fig. 2is a bottom plan view of Fig. 1; Fig. 3 is a view similar to Fig. 1 withthe parts in pipe engaging positions, and partly in section; Fig. 4 is asection taken on the line 4-4 of Fig. 1; and Fig. 5 is a detached Viewof the die.

The wrench comprises a hook 6 the curvature of which approximates thatof the size of pipe for which the wrench is made, as the wrenches willbe made of difierent sizes to meet different conditions, and thestraight portion of the hook member is slotted, as shown at 7, and has apivot pin 8 passed from one leg to the other near the end of the slottedportion of the member 6. Slidably mounted between the legs formed by theslot 7 is a carrier for the die 9, said carrier comprising a bodyportion 10, a seat 11 for the die 9, a hook 12, and a T-back l3 bearinagainst the back of the member 6. Carrie by the pivot pin 8 is a handle14 provided with a projection 15 within the member 6 adapted forengagement with the hook 12 of the die carrier when the parts are ininoperative positions, thus locking the sured because of the handleleverage and of i the sharp edge of the die and, when one of the edgesbecomes dulled, all that is necessary is to loosen the screw 17 andpresent a new edge of the die to the pipe 16.

The die 9 will preferably be made square although, obviously, I do notlimit myself to such formation, the square form being preferably for thereason that eight edges of the same length are provided.

My wrench is in no respect an adjustable one inasmuch as the pivot 8 isfiXed with respect to the hook member 6, although there is naturally adegree of play to the carrier which will adapt the wrench to pipes ofvarying diameters. There is actually but one jaw, the die 9, inasmuch asthe hook 6 encircles the pipe and approximately conforms thereto withoutany biting effect, and a strong and powerful wrench is thusprovided.

Having fully described my invenion, what I claim as new, and desire tosecure by Letters Patent, is v A pipe wrench, comprising a jaw memberhook-shaped at its outer end and provided with a slot in the bodyportion thereof,

a die carrier slidable in said slot and of T-shape in cross section withthe web thereof resting in said slot and with the cross-bar bearingagainst the back of said jaw member, a die detachably held on the edgeof said web portion and serving to imprison said carrier in said slot,and an operating lever pivoted in said slot and bearing against theunder side of said carrier.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JAMES A. ROBERTS. Witnesses:

LEWIS H. RoBnR'rs, ANNA Roenns ROBERTS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, I). 0.

